The two LEDs were attached directly to two pins each of the attiny13A. Two pins are used for each LED, the second pin is set low to use as a ground connection.

The current limit of the I/O pins on the AVR will prevent the LEDs from drawing too much so a resistor is not necessary to connect in series.

The speaker used is typical of one found in a musical greeting card, any small speaker will do, given that this is outputting a square wave tone, it’s not too important to worry about driving the speaker or sound quality.

Step: 2 Soldering the AVR to the LEDs and Speaker

For the LEDs to go reach out like arms one pin is bent over the AVR each side. Orienting the AVR this way makes it easy to connect to the speaker (second image) since the connections are on the two bottom pins.

For aesthetics you want to the front of the chip facing out so be sure the speaker is facing the same way when it is attached.

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There have been several Instructables dealing with outputs from the ATtiny2313 and similar AVR devices. For example, http://www.instructables.com/id/Ghetto-Programming%3a-Getting-started-with-AVR-micro/, http://www.instructables.com/id/Drive-a-Stepper-Motor-with-an-AVR-Microprocessor/. Working...